使用LINQ将两个表中的SQL数据输出到XML

Question

i am very new to this. Hope someone could help me suggest how to improve the code.

I have two tables where i need to get the SQL data and ouput it into XML format. I am using LINQ method. Below how the code looks like.

#region Database XML Methods

private static void CreateDatabaseXml(string path)
{
    tbchrDataContext db = new tbchrDataContext();
    XDocument doc = new XDocument(
        // XML Declaration
        new XDeclaration("1.0", "utf-8", "yes"),
        // XML Root element to 3rd in nest
        new XElement(ns + "WMS",
        new XElement(ns + "Order",
        new XElement(ns + "Header", from a in db.T_ORDER_DETAILs
                                    select new XElement(ns + "RARefNum", a.RARefNum), 
                                    new XElement (ns + "WMSCategory", from b in db.T_ORDER_HEADERs select b.Customer),
                                    new XElement (ns + "CustomerID", from a in db.T_ORDER_DETAILs select a.SupplierName)))) );

    #endregion
    doc.Save(path);
}

And below how is the output of XML looks like.

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<WMS xmlns="http://blog.cripperz.sg">
  <Order>
    <Header>
      <RARefNum>RASO000001</RARefNum>
      <RARefNum>RASO000001</RARefNum>
      <WMSCategory>ESSVMI</WMSCategory>
      <CustomerID>nVidianVidia</CustomerID>
    </Header>
  </Order>
</WMS>

Ultimately i wanted to achieve the below XML, some of the data grab from SQL is from two separate tables in one XML nest / element.

<?xml version="1.0" encoding="utf-8"?>
<WMS>
    <Order>
        <Header>
            <RARefNum>RASO000001</RARefNum>
            <WMSCategory>ESSVMI</WMSCategory>
            <CustomerID>nVidia</CustomerID>
            <CreationDate>2013-12-02 06:29:50</CreationDate>
            <OrderDate>2013-12-02 06:29:50</OrderDate>
            <ExpectedShippedDate>2013-12-02 06:29:50</ExpectedShippedDate>
            <LastShippedDate>2013-12-02 06:29:50</LastShippedDate>
            <CustomerOrderReference>nVidia9338</CustomerOrderReference>
            <CustomerShipmentNo>81475721</CustomerShipmentNo>
            <CustomerSONo>SO982733</CustomerSONo>
            <CustomerInvoiceNo>INV987373</CustomerInvoiceNo>
            <CustomerReference1>nVidia 1</CustomerReference1>
            <CustomerReference2/>
            <WMSReference1>Emp 1</WMSReference1>
            <WMSReference2>Emp 2</WMSReference2>
            <ShipmentNo>IWU997872</ShipmentNo>
            <DocumentNo>KK98764394</DocumentNo>
            <Transportation>
                <Mode>Freight</Mode>
                <VehicleType/>
            </Transportation>
            <Carrier>
                <ID>Fedex</ID>
                <Name>Fedex SG</Name>
                <Address>Changi Singapore</Address>
                <Country/>
                <PostalCode/>
                <Contact>
                    <Sequence/>
                    <Person/>
                    <Email/>
                    <DID/>
                    <Handphone/>
                </Contact>
            </Carrier>
            <Consignee>
                <ID>ABC</ID>
                <Name>ABC Corp</Name>
                <Address>Jurong West, Singapore</Address>
                <Country/>
                <PostalCode/>
                <Contact>
                    <Sequence/>
                    <Person/>
                    <Email/>
                    <DID/>
                    <Handphone/>
                </Contact>
            </Consignee>
            <Containers/>
        </Header>
        <Details>
            <Detail>
                <LineNo>1</LineNo>
                <SKU>SKU0001</SKU>
                <SKUDescription>SKU 0001</SKUDescription>
                <Package>50</Package>
                <OrderedQty>600.000</OrderedQty>
                <PickedQty>600.000</PickedQty>
                <PickedDate>2013-12-02 06:35:09</PickedDate>
                <ShippedQty>600.000</ShippedQty>
                <ShippedDate>2013-12-02 06:35:09</ShippedDate>
                <ManufactoryDate>2013-12-02 06:35:09</ManufactoryDate>
                <ExpiryDate>2014-12-02 06:35:09</ExpiryDate>
                <FIFODate>2013-06-02 06:35:09</FIFODate>
                <CustomerLotRef1>nVidia 2093</CustomerLotRef1>
                <CustomerLotRef2>nVidia 2099</CustomerLotRef2>
                <LineReference1>10</LineReference1>
            </Detail>
            <Detail>
                <LineNo>2</LineNo>
                <SKU>SKU0002</SKU>
                <SKUDescription>SKU 0002</SKUDescription>
                <Package>50</Package>
                <OrderedQty>100.000</OrderedQty>
                <PickedQty>100.000</PickedQty>
                <PickedDate>2013-12-02 06:35:09</PickedDate>
                <ShippedQty>100.000</ShippedQty>
                <ShippedDate>2013-12-02 06:35:09</ShippedDate>
                <ManufactoryDate>2013-12-02 06:35:09</ManufactoryDate>
                <ExpiryDate>2014-12-02 06:35:09</ExpiryDate>
                <FIFODate>2013-06-02 06:35:09</FIFODate>
                <CustomerLotRef1>nVidia 2193</CustomerLotRef1>
                <CustomerLotRef2>nVidia 2199</CustomerLotRef2>
                <LineReference1>10</LineReference1>
            </Detail>
        </Details>
    </Order>
</WMS>

Is there a better way to code it?

Answer 1

I dont know if this is better but I would probably make some variables instead of calling the linq in the xml. Then you can just call the variable in the xml document.

Something like this maybe:

 private static void CreateDatabaseXml(string path)
{
    tbchrDataContext db = new tbchrDataContext();

    var rARefNum = db.T_ORDER_DETAILs.Select(i => i.RARefNum).Single();
    var customer = db.T_ORDER_HEADERs.Select(i => i.Customer).Single();
    var supplierName = db.T_ORDER_DETAILs.Select(i => i.SupplierName).Single();

    XDocument doc = new XDocument(
        // XML Declaration
        new XDeclaration("1.0", "utf-8", "yes"),
        // XML Root element to 3rd in nest
        new XElement(ns + "WMS",
        new XElement(ns + "Order",
        new XElement(ns + "Header", new XElement(ns + "RARefNum", rARefNum), 
                                    new XElement (ns + "WMSCategory", customer),
                                    new XElement (ns + "CustomerID", supplierName)))) );

    #endregion
    doc.Save(path);
}

Answer 2

• In sql server support lot of xml format outputs.

• This query returns a xml document from two tables. Maybe you are using linq, then after completing your sql query, you execute the query from linq.

  select table1.column1, table2.column2 from table1 inner join table2 on table2.table1_id = table1.Id for xml auto

Check this link .